The average American farmer is a white man in his late 50s. Or at least, that's who's in charge of the farm, according to new data from the U.S. Department of Agriculture.

But the number of female-run farms has tripled since the 1970s, to nearly 14 percent in 2012. And if you dig a little deeper, you'll find women are showing up in new roles. But because of the way farm businesses are structured, women's work often isn't included in those USDA counts.